CN114658950A

CN114658950A - Explosion-proof pipeline plugging air bag

Info

Publication number: CN114658950A
Application number: CN202210408401.5A
Authority: CN
Inventors: 刘超; 谢雷; 李开泰
Original assignee: China First Metallurgical Group Co Ltd
Current assignee: China First Metallurgical Group Co Ltd
Priority date: 2022-04-19
Filing date: 2022-04-19
Publication date: 2022-06-24
Anticipated expiration: 2042-04-19
Also published as: CN114658950B

Abstract

The application discloses explosion-proof formula pipeline shutoff gasbag. It comprises the following steps: the air bag membrane is provided with a bag cavity, and an air bag framework, a fixed tray and a tray connecting piece are arranged in the bag cavity; the two end parts of the air bag framework are supported by the fixing tray, and the other parts of the air bag framework are arranged on the inner wall surface of the air bag cavity; the tray connecting piece comprises a separable connecting structure and a first connecting section and a second connecting section which are fixedly arranged on the fixed tray, wherein the separable connecting structure can be operated by external force to generate separation action so as to release the connection of the first connecting section and the second connecting section or can be operated by external force to generate closing action so as to form connection of the first connecting section and the second connecting section. Among this technical scheme, through the fixed tray that sets up, gasbag skeleton and separable connection structure three support each other or mutually support each other, very big improvement the security and the stability of pipeline shutoff, when the gasbag wall is punctured or lacerated, can avoid the whole burst in the twinkling of an eye of gasbag outer wall, play certain slow effect to the rivers that leak down.

Description

Explosion-proof pipeline plugging air bag

Technical Field

The application relates to the technical field of pipeline emergency maintenance, in particular to an explosion-proof pipeline plugging air bag.

Background

In the related technology, the plugging air bag is easily affected by uncontrollable external force, and is punctured or scratched by sharp objects such as burrs on the inner wall of a pipeline, glass in sewage, stones and the like, so that explosion accidents are easy to happen, and the water flow blocked at the upstream is instantly flushed down, so that great threat is caused to the safety of downstream constructors.

Disclosure of Invention

In view of this, the application provides explosion-proof formula pipeline shutoff gasbag, can effectively prevent to explode the split in twinkling of an eye when gasbag wall is punctured or lacerated.

An explosion-proof pipeline plugging airbag, comprising:

the air bag film is provided with a bag cavity, and an air bag framework, a fixed tray and a tray connecting piece are arranged in the bag cavity;

the two ends of the air bag framework are supported by the fixing tray, and the non-end part of the air bag framework is arranged on the inner wall surface of the bag cavity;

and the tray connecting piece comprises a separable connecting structure and a first connecting section and a second connecting section which are fixedly arranged on the fixed tray, wherein the separable connecting structure can be operated by external force to generate separation action so as to enable the connection of the first connecting section and the second connecting section to be contacted, or can be operated by external force to generate closing action so as to enable the first connecting section and the second connecting section to be connected.

Optionally, the separable coupling structure is a hook provided on the first connection section and the second connection section, respectively.

Optionally, the balloon armature is a flexible rod-like member.

Optionally, the fixed tray is mounted within the pocket by a screw.

Optionally, the tray further comprises a pulling ring arranged on the fixed tray.

Optionally, an end of the airbag frame is rotatably supported by the fixed tray.

Optionally, the first connecting section and the second connecting section are elastic rod-shaped pieces.

The anti-explosion pipeline plugging air bag has the advantages that the anti-explosion pipeline plugging air bag is provided, the fixed tray, the air bag framework and the separable connecting structure are arranged to mutually support or mutually cooperate, the safety and the stability of pipeline plugging are greatly improved, when the air bag wall is punctured or scratched, the whole outer wall of the air bag can be prevented from being instantaneously cracked, and certain delaying effect is realized on the discharged water flow.

Drawings

The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an explosion-proof pipeline plugging airbag in an inflated state according to an embodiment of the present application.

FIG. 2 is a schematic structural diagram of an embodiment of the present application, illustrating an uninflated state of an anti-explosion pipeline plugging airbag;

FIG. 3 is a schematic side view of the explosion-proof pipeline plugging airbag of the present application;

wherein the elements in the figures are identified as follows:

120-balloon cage; 130-an air intake; 140-a stationary tray; 150-a screw joint; 160-air outlet holes; 170-tray connection; 171-a first connecting section; 172-a second connection segment; 173-separable coupling structure; 180-pulling rings; 190-an air sac membrane; 200-pipeline.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Before the technical solutions of the present application are introduced, it is necessary to explain the background of the invention of the present application.

It is common that in the related art, the plugging air bag is easily affected by an uncontrollable external force, and is punctured or scratched by sharp objects such as burrs on the inner wall of the pipeline 200, glass in sewage, stones and the like, so that an explosion accident is easily caused, and the water flow blocked at the upstream is instantly flushed and discharged to cause great threat to the safety of downstream constructors.

Based on the above-mentioned difficulties of the inventor's awareness, the inventor proposes the explosion-proof type pipeline 200 to block the air bag, which is supported or matched with each other by the three arranged fixing tray 140, the air bag frame 120 and the separable connecting structure, specifically, the mutual matching relationship of the three is as follows:

the airbag framework 120 is arranged, the airbag framework 120 can effectively support the wall of the airbag membrane 190, the first connecting section 171 and the second connecting section 172 are connected by the closed state of the separable connecting structure, and can form a complete supporting system together with the support of the airbag framework 120, so that the necessary stability of the overall structure of the airbag is maintained, and the rapid contraction of the airbag when the airbag is subjected to sudden mechanical puncture or laceration can be avoided. The rapid contraction is caused by the internal gas leakage from the airbag due to sudden mechanical puncture or laceration. Specifically, the inflated airbag membrane 190 is in an elastically stretched state due to the inherent elasticity of the airbag membrane 190, and when the internal gas leaks, the elastic force of the elastically stretched airbag membrane 190 is instantaneously released. If the release of the elastic force occurs in a very short time, the rapid compression of the internal gas will be accelerated to cause a sudden increase of the internal gas pressure, and finally trigger the instantaneous explosion.

In the present application, the airbag frame 120, the first connecting section 171 and the second connecting section 172 connected to each other, together form a supporting system, which can effectively retard or partially eliminate the elastic force release of the airbag membrane 190 (under normal conditions, the pressure of the gas inside the airbag is relatively high, and the elastic force release cannot be completely overcome theoretically), thereby avoiding rapid contraction, improving the stability of contraction, and eliminating instant explosion.

In addition to the above-described prevention of the occurrence of the instantaneous explosion by the support system, the separation operation of the separable coupling structure can also effectively prevent the occurrence of the instantaneous explosion. Specifically, the method comprises the following steps: since the separable connecting structure can be operated by external force to generate the separating action, when the airbag is subjected to sudden mechanical puncture or laceration, the instantaneous leakage of the gas in the airbag cavity can cause a contraction external force which causes the airbag to contract, and the separable connecting structure triggers the separating action under the action of the collapse external force, so that the connection of the first connecting section 171 and the second connecting section 172 which are originally formed by the closed state of the separable connecting structure is released, and the damage of partial collapse external force to the airbag is absorbed or eliminated.

Through the separation of the support system and the separable connecting structure, the instant explosion caused by the puncture or the laceration of the air bag wall can be effectively prevented finally. Therefore, the invention is created.

Referring to fig. 1-3, the embodiment of the present application provides an anti-explosion type pipeline 200 plugging balloon, where the anti-explosion type pipeline 200 plugging balloon can be applied to plugging various pipelines 200 such as water flow and sewers, and the purpose of plugging is to facilitate the operation of maintenance and inspection of the pipeline 200 by the operators downstream of the fluid.

The explosion-proof type pipeline 200 plugging air bag comprises:

an airbag membrane 190 having a bag cavity, the bag cavity having an airbag frame 120, a fixed tray 140 and a tray connector 170;

the airbag frame 120 having both ends supported by the fixing tray 140, and the non-end portion of the airbag frame being provided on the inner wall surface of the bag cavity;

and the tray connector 170 including a separable coupling structure capable of being operated by an external force to perform a separation action such that the connection of the first and

second coupling sections

171 and 172 is contacted, or capable of being operated by an external force to perform a closing action such that the first and

second coupling sections

171 and 172 are connected, and a first coupling section 171 and a second coupling section 172 fixedly mounted to the fixed tray 140.

The air bag film 190 may be made of rubber, and is formed in an elliptic cylinder shape as a whole, and is expanded by an inflation method, and when the gas pressure in the water blocking air bag reaches a predetermined requirement, the inflation is stopped, and the water blocking air bag is filled in the cross section of the whole pipeline 200, and the water leakage is blocked by the frictional force generated by the pipeline 200 and the wall of the air bag, so as to achieve the condition of downstream anhydrous construction.

The air inlet holes 130 and the air outlet holes 160 are formed in the air bag film 190, as is well known in the art. The air inlet 130 is made of metal, is sealed by a rubber ring, and is provided with an air nozzle valve, when the air bag needs to be used, the air bag is inflated by an inflating pump, and whether the air bag leaks air or not is checked.

The air outlet 160 is made of metal, the rubber ring is sealed, an air tap valve is arranged, and when the air bag is used, the air outlet 160 valve of the air bag is opened slowly to release air, so that the air bag is safe and reliable.

The expression "capable of being operated by an external force to produce a separating action" in the foregoing, it is understood that, in the case of being subjected to an external force, this external force easily triggers the separating action; similarly, the expression "operable to produce a closing action by an external force" means that the disengageable coupling structure is operable to produce a closing action under the operation of a particular external force.

Here, it can be appreciated by those skilled in the art that the separable coupling structure includes two parts that mate with each other, i.e., the two parts form a closing action by contacting and the two parts form a separating action by releasing the contact.

As an exemplary implementation of the separable coupling structure, the separable coupling structure is a hook provided on the first and

second connection sections

171 and 172, respectively.

Thus, when the airbag is suddenly punctured or scratched by a machine, the shrinkage force of the airbag may deform the airbag membrane 190, which may cause the first connecting section 171 and the second connecting section 172 to slightly shift left and right, and may cause the first connecting section 171 and the second connecting section 172 to be disengaged.

It is naturally conceivable that the shape or configuration of the hook member may be appropriately adjusted according to the length and material elasticity of the first and second connecting

sections

171 and 172, and the air pressure inside the airbag film 190.

As other implementations, the hooks here can be replaced by snaps or plugs or pins or the like. The purpose of the invention can be achieved by only adjusting the tightness of clamping or inserting or pin joint according to actual needs.

In an exemplary embodiment, the first connecting section 171 and the second connecting section 172 are elastic rod-shaped members.

Thus, the "elasticity" of the first and second connecting

segments

171 and 172 is considered: in normal occlusion use, the balloon is in an inflated state, and the elastic expansion of the balloon membrane 190 elastically expands the connected first connecting segment 171 and second connecting segment 172. When the airbag is subjected to sudden mechanical puncture or laceration, the contraction force of the airbag can elastically release the first connecting section 171 and the second connecting section 172, and at the moment, the first connecting section 171 and the second connecting section 172 can be promoted to shake or deviate, so that the two parts which can form the separation and connection structure are driven to shake or deviate relatively, and the triggering of the closing action is promoted.

In an exemplary embodiment, the balloon armature 120 is a flexible rod-like member.

In this way, the "flexibility" of the flexible rod-like member enables the balloon framework 120 to adapt to the shrinkage of the balloon when it is subjected to sudden mechanical punctures or lacerations, reducing the risk of balloon explosion caused by excessive rigidity of the balloon framework 120.

Of course, further, the airbag frame 120 may be made of a material having good elasticity and toughness, such as a metal stretchable frame or a polymer resin frame. The number of the balloon frames 120 may be plural, for example, 10 to 30, and the plural balloon frames are distributed at each position of the inner wall of the balloon membrane 190, and may be arranged in a ring shape along the axial direction of the balloon membrane 190.

In an exemplary embodiment, the end of the airbag housing 120 is rotatably supported by the fixing tray 140.

Thus, the design considerations for the rotational connection of the airbag frame 120 are: the airbag frame 120 is facilitated to be better attached to the inner wall surface of the airbag membrane 190 when the airbag is inflated, so that a better supporting effect for the airbag membrane 190 is improved.

As an exemplary implementation, the stationary tray 140 is mounted within the pocket by screws 150.

Here, the screw 150 may be exemplified by a screw. This facilitates removal of the mounting tray 140 and, ultimately, the airbag frame 120.

Optionally, a pulling ring 180 disposed on the fixed tray 140 is further included.

Therefore, in the process of plugging or repairing the pipeline 200, the air bags can be arranged in the inspection well and the water flowing in the pipeline 200 by utilizing the traction ring, and the harm of harmful gas in the pipeline 200 to the life safety of construction personnel is completely avoided.

The operation and construction process of the air bag plugging operation of the present application will now be described with respect to a common application scenario. It should be noted that this common embodiment is not to be taken as an identification basis for understanding the essential features of the technical problem to be solved as claimed in the present application, which is merely exemplary.

(1) The fittings of the air charging device of the circular pipeline 200 plugging device are combined, tool air leakage detection is carried out, and whether the air bag leaks air or not is checked.

(2) The explosion-proof hooks inside the airbag are connected in advance, the airbag framework 120 is combed, and the airbag is ready to be inflated.

(3) The inspection well or the pipeline 200 needing to be overhauled is opened, the air bag is slowly put into the pipeline 200 needing to be overhauled through the pulling ring 180, the air bag is prevented from being punctured by hard sundries in the process of pulling and dragging, a protection bag can be arranged outside the air bag, after the air bag is pulled to a target position, the protection bag is pulled away, then the air bag is inflated by an air pump, the air pressure does not exceed 0.15MPa, and the air bag is inflated to proper pressure.

(4) In order to prevent the inflation tube and the air inlet from falling off in the air bag inflation process, a rope or a patch and a screw are used for fastening at the interface of the air bag inflation inlet and the rubber tube.

(5) When the air pump is used for inflating the air bag, the pressure in the plugging air bag is kept uniform, and whether the pressure gauge rises or not is observed, if the pressure gauge rises rapidly, the inflation is too fast. At this time, the inflation speed should be slowed down, and the air stop valve should be slightly screwed down. In order to reduce the air inlet speed, too fast air inflation also causes the risk of explosion of the air bag, and because the power of the used air pump is different in brand quality and the air inflation speed is different, the time required for the air bag to inflate must be calculated when the ground is inflated.

(6) During engineering operation, the pressure value of the air bag needs to be paid attention to all the time, if the pressure value of the air bag is slowly reduced, the operation is not stopped, the air pump is used for continuously supplying air to the air bag to the standard air pressure, and the air bag or accessories are inspected to leak air after the operation is finished.

(7) After the use, the valve of the air outlet is slowly opened, the air in the air bag is slowly released, then the air bag is slowly pulled out through the pulling ring 180, the surface of the sealed air bag of the pipeline 200 is immediately cleaned after the use, and the special cleaning agent is used for cleaning the air bag. After the air bag is cleaned, no attachments on the surface can be stored in a warehouse, and the air bag needs to be kept ventilated and dry when being stored and needs to be kept away from strong corrosive chemicals or fire sources.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.

Claims

1. An explosion-proof formula pipeline shutoff gasbag which characterized in that includes:

and the tray connecting piece comprises a separable connecting structure and a first connecting section and a second connecting section which are fixedly arranged on the fixed tray, wherein the separable connecting structure can be operated by external force to generate separation action so as to release the connection of the first connecting section and the second connecting section or can be operated by external force to generate closing action so as to connect the first connecting section and the second connecting section.

2. The explosion proof duct-plugging airbag of claim 1, wherein the separable coupling structure is a hook provided on the first connecting section and the second connecting section, respectively.

3. The explosion proof pipeline plugging balloon of claim 1, wherein the balloon framework is a flexible rod-like member.

4. The explosion proof type pipeline plugging air bag according to claim 1, wherein the fixing tray is installed in the bag cavity through a screw joint.

5. The explosion proof type pipeline plugging air bag according to claim 1, further comprising a pulling ring disposed on the fixing tray.

6. The explosion proof pipe blocking bladder of claim 1 wherein an end of the bladder frame is rotatably supported by the fixed tray.

7. The explosion proof pipeline blocking balloon of claim 1, wherein the first and second connecting sections are resilient rod-like members.